HELP! Folder/directory dissapeared & effecting my clients

Last night I noticed that the cpanel was running extremely show and still seems to be today as well. My website is also running slow. But my bigger problem is today I had a client sign up for services on my website and when they went to test after entering their info it wasn't working properly.

Based on the errors they are getting, the file upload problem is caused because one of my directories being missing, just vanished or it's been deleted. On the website's control panel's file manager, and am not seeing this directory.

Last night I went to cpanel to checkemail and ALL of my emails...saved, new, folders, sent was GONE. I kept checking it and nothing was there. Went back a couple hours later and there were all the folders and emails. So I'm wondering could this vanishing directory that is causing my website to now not function fully for my clients be somehow connected to a problem cpanel might be experiencing?

If I knew that it was on their end and something they were addressing and it would be repaired and my folder directory would reappear soon I could relax more. But I have clients that are depending on my services working properly.